Internet of Things (IoT) is revolutionizing the electronics industry. With more and more applications adapting IoT, it is important for the engineers of today to get acquainted with this technology.

The DS3231 is a Precise Real Time Clock Module based on the AT24C32 IC. The module can provide information like date, day, week and time to a microcontroller through I2C communication. The DS3231 is a Precise Real Time Clock Module based on the AT24C32 IC. The module can provide information like date, day, week and time to a microcontroller through I2C communication.

Here we make an IoT enabled inventory management system using an Ultrasonic Sensor, NodeMCU ESP8266, and ThingSpeak cloud platform. In this system Ultrasonic sensor is used to count the number of products stored in a rack, ThingSpeak is used for live monitoring of data, and IFTTT is used to send a mail whenever the products count goes below the user-defined criteria.

In this project, we are going to send Temperature and Humidity sensor data to Thingspeak using DHT11. By this method we can monitor our DHT11 sensor’s temperature and humidity data over internet using ThingSpeak IOT server, and we can view the logged data and graph over time on the ThingSpeak dashboard.

The MCP3008 is an 8-Channel 10-bit ADC IC, so it can measure 8 different analog voltage with a resolution of 10-bit. It measures the value of analog voltage from 0-1023 and sends the value to a microcontroller or microprocessor through SPI communication.